I will show you how you can make this cool looking radar using the Arduino Board and the Processing Coding Environment. This Code Connects Arduinos Ultrasonic Sensor Equipment to visualize what the radar detects on Processing.

All you need for this Arduino Project is an Ultrasonic Sensor for detecting the objects, a small hobbyist Servo Motor for rotating the sensor and an Arduino Board for controlling them. You can watch the following video or read the written tutorial below.

Supplies

Ultrasonic Sensor HC-SR04

Servo Motor

Breadboard

Jump Wires

Arduino IDE

Processing Application

Step 1: Wiring

Double Check to make sure you Don't make any mistakes.

Step 2: Code for Arduino and Processing

//Arduino Code

#include .

const int trigPin = 10; const int echoPin = 11;

long duration; int distance; Servo myServo; void setup() { pinMode(trigPin, OUTPUT); pinMode(echoPin, INPUT); Serial.begin(9600); myServo.attach(12); } void loop() {

for(int i=15;i<=165;i++){ myServo.write(i); delay(30); distance = calculateDistance(); Serial.print(i); Serial.print(","); Serial.print(distance); Serial.print("."); }

for(int i=165;i>15;i--){ myServo.write(i); delay(30); distance = calculateDistance(); Serial.print(i); Serial.print(","); Serial.print(distance); Serial.print("."); } }

int calculateDistance(){ digitalWrite(trigPin, LOW); delayMicroseconds(2); digitalWrite(trigPin, HIGH); delayMicroseconds(10); digitalWrite(trigPin, LOW); duration = pulseIn(echoPin, HIGH); distance= duration*0.034/2; return distance; }

//Processing Code

import processing.serial.*; // imports library for serial communication
import java.awt.event.KeyEvent; // imports library for reading the data from the serial port import java.io.IOException; Serial myPort; // defines Object Serial // defubes variables String angle=""; String distance=""; String data=""; String noObject; float pixsDistance; int iAngle, iDistance; int index1=0; int index2=0; PFont orcFont; void setup() { fullScreen(); // ***CHANGE THIS TO YOUR SCREEN RESOLUTION*** smooth(); myPort = new Serial(this,"/dev/tty.usbmodem144101", 9600); // starts the serial communication myPort.bufferUntil('.'); // reads the data from the serial port up to the character '.'. So actually it reads this: angle,distance. orcFont = loadFont("OCRAExtended-30.vlw"); } void draw() { fill(98,245,31); textFont(orcFont); // simulating motion blur and slow fade of the moving line noStroke(); fill(0,4); rect(0, 0, width, height-height*0.065); fill(98,245,31); // green color // calls the functions for drawing the radar drawRadar(); drawLine(); drawObject(); drawText(); } void serialEvent (Serial myPort) { // starts reading data from the Serial Port // reads the data from the Serial Port up to the character '.' and puts it into the String variable "data". data = myPort.readStringUntil('.'); data = data.substring(0,data.length()-1); index1 = data.indexOf(","); // find the character ',' and puts it into the variable "index1" angle= data.substring(0, index1); // read the data from position "0" to position of the variable index1 or thats the value of the angle the Arduino Board sent into the Serial Port distance= data.substring(index1+1, data.length()); // read the data from position "index1" to the end of the data pr thats the value of the distance // converts the String variables into Integer iAngle = int(angle); iDistance = int(distance); } void drawRadar() { pushMatrix(); translate(width/2,height-height*0.074); // moves the starting coordinats to new location noFill(); strokeWeight(2); stroke(98,245,31); // draws the arc lines arc(0,0,(width-width*0.0625),(width-width*0.0625),PI,TWO_PI); arc(0,0,(width-width*0.27),(width-width*0.27),PI,TWO_PI); arc(0,0,(width-width*0.479),(width-width*0.479),PI,TWO_PI); arc(0,0,(width-width*0.687),(width-width*0.687),PI,TWO_PI); // draws the angle lines line(-width/2,0,width/2,0); line(0,0,(-width/2)*cos(radians(30)),(-width/2)*sin(radians(30))); line(0,0,(-width/2)*cos(radians(60)),(-width/2)*sin(radians(60))); line(0,0,(-width/2)*cos(radians(90)),(-width/2)*sin(radians(90))); line(0,0,(-width/2)*cos(radians(120)),(-width/2)*sin(radians(120))); line(0,0,(-width/2)*cos(radians(150)),(-width/2)*sin(radians(150))); line((-width/2)*cos(radians(30)),0,width/2,0); popMatrix(); } void drawObject() { pushMatrix(); translate(width/2,height-height*0.074); // moves the starting coordinats to new location strokeWeight(9); stroke(255,10,10); // red color pixsDistance = iDistance*((height-height*0.1666)*0.025); // covers the distance from the sensor from cm to pixels // limiting the range to 40 cms if(iDistance<40){ // draws the object according to the angle and the distance line(pixsDistance*cos(radians(iAngle)),-pixsDistance*sin(radians(iAngle)),(width-width*0.505)*cos(radians(iAngle)),-(width-width*0.505)*sin(radians(iAngle))); } popMatrix(); } void drawLine() { pushMatrix(); strokeWeight(9); stroke(30,250,60); translate(width/2,height-height*0.074); // moves the starting coordinats to new location line(0,0,(height-height*0.12)*cos(radians(iAngle)),-(height-height*0.12)*sin(radians(iAngle))); // draws the line according to the angle popMatrix(); } void drawText() { // draws the texts on the screen pushMatrix(); if(iDistance>40) { noObject = "Out of Range"; } else { noObject = "In Range"; } fill(0,0,0); noStroke(); rect(0, height-height*0.0648, width, height); fill(98,245,31); textSize(25); text("10cm",width-width*0.3854,height-height*0.0833); text("20cm",width-width*0.281,height-height*0.0833); text("30cm",width-width*0.177,height-height*0.0833); text("40cm",width-width*0.0729,height-height*0.0833); textSize(40); text("Object: " + noObject, width-width*0.875, height-height*0.0277); text("Angle: " + iAngle +" °", width-width*0.48, height-height*0.0277); text("Distance: ", width-width*0.26, height-height*0.0277); if(iDistance<40) { text(" " + iDistance +" cm", width-width*0.225, height-height*0.0277); } textSize(25); fill(98,245,60); translate((width-width*0.4994)+width/2*cos(radians(30)),(height-height*0.0907)-width/2*sin(radians(30))); rotate(-radians(-60)); text("30°",0,0); resetMatrix(); translate((width-width*0.503)+width/2*cos(radians(60)),(height-height*0.0888)-width/2*sin(radians(60))); rotate(-radians(-30)); text("60°",0,0); resetMatrix(); translate((width-width*0.507)+width/2*cos(radians(90)),(height-height*0.0833)-width/2*sin(radians(90))); rotate(radians(0)); text("90°",0,0); resetMatrix(); translate(width-width*0.513+width/2*cos(radians(120)),(height-height*0.07129)-width/2*sin(radians(120))); rotate(radians(-30)); text("120°",0,0); resetMatrix(); translate((width-width*0.5104)+width/2*cos(radians(150)),(height-height*0.0574)-width/2*sin(radians(150))); rotate(radians(-60)); text("150°",0,0); popMatrix(); }